condition	mean	min	max
0 h after light	6.93946	5.19559	8.68333
4 h after light	15.53615	12.1543	18.918
8 h after light	14.447500000000002	10.2948	18.6002
4 h after dark	17.93215	14.8978	20.9665
8 h after dark	18.85595	17.4945	20.2174
12 h after dark	10.51603	6.08576	14.9463